Open-hearth furnace



Filed Nov. 15, 1926 '3 Sheets-Sheet nfor:

Witnesses.-

OPEN HEARTH FURNACE Filed Nov. 15, 1926 3 Sheets-Sheet 2 'lfc'tnessesx Inventor: 1

7 5 .1 so M HON? 4/ A June 11, 1929.

T. J. JAMISON.

OPEN HEARTH FURNACE Sheets- Sheet Filed Nov. 15, 1926 g ro/v48 .f. .h/wso/v Patented June 11, 1929.

THOMAS J. JAMISON, O1 HOMESTEAD, PENNSYLVANIA.

OPEN-HEARTH FURNACE.

Application filed November 15, 1926. Serial'No. 148,533.

This invention relates to open hearth furnaces, and more particularly to furnaces of this class having novelmeans for receiving the hot metal charged in said furnaces, and has for its object the provision of a hot metal receiving spout permanently secured to the furnace, thus eliminating the necessity of using a detachable spout which must be placed in position with the furnace charging machine every time hot metal is to be charged into the furnace.

The present spout does not interfere with the charging of other furnaces, since the charging machine is free to operate as desired, and charging buggies carrying cold metal to be charged can pass under the spout while hot metal is being charged.

The spout of this invention eliminates the cost of upkeep of the removable spouts heretofore used, reduces the work of the charging machine, and eliminates all possibility of iron coming out of the furnace due to the removal of the old style spouts,

In the drawings:

Figure 1 is a partial side elevation of an open hearth furnace embodying this invention.

Figure 2 is a transverse sectional elevation of the hot metal receiving spout.

Figure 3 is an enlarged detail side elevation of the receiving spout showing the surrounding furnace wall in section.

Figure 4 is an enlarged detail front elevation of the receiving spout as built into a fur- Referring more particularly to the drawings. the letter A designates the furnace as a whole, which is generally of standard design, with the exception that the portion of the side wall between the'two endmo st buckstays 2 and 3 on the charging side of the furnace is provided with a hot metal opening or doorway 4. A metal door frame 5 is secured between the buckstays 2 and 3.

A metal spout casing B, composed of side walls 6 and a front wall 7 is secured to the buckstays 2 and 3 by bolts 8 which pass through the side walls 6. The side walls 6 are cut away on a line from their upper rear corners to their lower forward corners, so that they are of substantially triangular shape in plan. The casing B has its rear edge mountedagainst the door frame 5, so that it extends upwardly and outwardly to provide an enlarged metal receiving end at its top, while its lower end communicates ivith the opening or doorway 4.

The portion of the door frame 5 and the inner surfaceof the spout casing B are lined w1th fire brick or other refractory material 9 to prevent the hot metal contacting therewith, and such lining is extended upwardly beyond the casing B to provide a door seat'against which a door C is adapted to seat.

The door C is composed of a metal top plate 10 and a depending frame portion 12 adapted to retain a brick or other refractory lining 14.

A pair of hinge arms 15 are secured to the top plate 10 and hingedly secured to the heads of bolts 16 secured in the furnace frame and projecting through the door frame'5 by bolts 17. v

A hydraulic cylinder 18 is mounted on the furnace frame between the buckstays 2 and 3, and has its plunger 19 .provided with a crosshead 20. Operating rods 21 extend downwardly from each end of the crosshead 20 through guide brackets 22 on the cylinder and have their lower ends connected by chains 23 to lugs 21 on the top plate 10 of the door or closure C.

In Figure 2 I have shown diagrammatically a ladle 25 in position to discharge hot or molten metal through the spout into the furnace. The ladle 25 is supported by trunnion hooks 26 and a tilting hook 27 depending from a suitable overhead support such as a crane.

In operation the cylinder 18 will be operated to open the closure C and the ladle will be tilted to discharge the molten metal into the spout from which the metal will flow through the doorway 4 into the furnace. When the ladle is empty it will be removed and the cylinder 18 operated to permit the door C to close by gravity.

The novel shape and position of the spout is such that it will not interfere with the passage of charging buggies, or the use of the charging machine, and it is a permanent part of the furnace and, therefore, eliminatesthe understood that I do not wish to be limited thereto since Various modifications may be made without departing from the scope of my invention as defined in the appended claims.

I claim:

1. The combination with an open hearth furnace, having charging doors, of an opening in one of its side walls adjacent the end thereof, through which hot metal is to be charged, a metal door frame permanently and rigidly secured around and extending materially beyond said opening, a metal spout casing mounted on said furnace and having its lower end communicating with said opening, said spout casing extending upwardly and outwardly so as to provide an enlarged upper receiving end, a refractory lining built over said door frame within said spoutcasing and around the inner surface of said casing, a door hingedly secured on said door frame for closing the upper end of said spout, a refractory lining 011 said door, and a hydraulic cylinder mounted on said furnace and operatively connected to said door for raising and lowering said door.

2. The combination with an open hearth furnace, of an opening in one of the side Walls of said furnace adjacent the end thereof through which hot. metal is to be charged, a metal door frame permanently and rigidly secured around and extending materially beyond said opening, a metal spout casing mounted on said furnace and having its lower end communicating with said opening, said spout casing extending upwardly and outwardly so as to provide an enlarged upper receiving end, a refractory lining built over said door frame within said spout casing and around the inner surface of said casing, a door hingedly secured on said door frame for closing the upper end of said spout, a refractory lining on said door, and means for raising and lowering said door. i

In testimony whereof, I have hereunto signed my name.

THOMAS J. JAMISON. 

